6008X Original Excavator Pump Bearing for Hitachi ZX230W-5N

Part number 6008X is an original deep groove ball bearing provided by Hitachi for hydraulic main pumps of excavators such as ZX230W-5N. This component is a key supporting part of the hydraulic pump transmission shaft or gear shaft, responsible for bearing radial loads and allowing the shaft system to rotate smoothly at high speeds. 6008 is a standard deep groove ball bearing model, which is mainly suitable for Hitachi ZX230W-5N excavators and may also be applicable to other ZAXIS-5N series models that use the same main pump assembly. As an original precision component, its clearance, accuracy level (such as P0, P6), and lubricating grease are strictly matched with the pump assembly design

This product is a deep groove ball bearing made of high carbon chromium bearing steel (such as GCr15), which has undergone heat treatment such as bainitic quenching, and has excellent wear resistance, fatigue strength, and dimensional stability. Its core function is to support the pump drive shaft, withstand radial loads, and allow for certain axial displacement and angular deviation compensation. As an original component, its internal clearance (such as C3 group) has been optimized to adapt to the temperature changes and load fluctuations of the excavator hydraulic pump, ensuring smooth operation at the grease lubrication limit speed of about 8000-10000 revolutions per minute.

Inspection and replacement: Every 500 working hours or during daily inspections, monitor the bearing area for any abnormal noise, vibration, or excessive temperature rise. If there are faults such as pump abnormal noise, shaft seal oil leakage, or unstable transmission, after excluding other reasons, the bearings should be checked for pitting corrosion, cage deformation, or excessive clearance. Bearings are precision and vulnerable parts, and once damaged, they usually need to be replaced. Attention: Before disassembling the old bearing, be sure to release the hydraulic system pressure; Moisture and rust prevention measures should be taken during storage to avoid collisions; When replacing bearings, it is recommended to check or replace the shaft seal and adjacent components simultaneously.